Articles | Volume 16, issue 3
Atmos. Chem. Phys., 16, 1511–1530, 2016
https://doi.org/10.5194/acp-16-1511-2016
Atmos. Chem. Phys., 16, 1511–1530, 2016
https://doi.org/10.5194/acp-16-1511-2016

Research article 10 Feb 2016

Research article | 10 Feb 2016

Origin of oxidized mercury in the summertime free troposphere over the southeastern US

V. Shah et al.

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Short summary
We present airborne observations of mercury over the southeastern USA during summer. Higher concentrations of oxidized mercury were observed in clean, dry air masses descending in the subtropical anti-cyclones. We used an atmospheric model to simulate the chemistry and transport of mercury. We found reasonable agreement with the observations when the modeled oxidation of elemental mercury was increased, suggesting fast cycling between elemental and oxidized mercury.
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